- Eaton UPS User's Guide

UPS WITH BYPASS ELECTRICAL INSTALLATION

Eaton 9170

UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality

After turning the load position handle to the UPS position and releasing

the red button, the Eaton 9170+ UPS remains in Bypass mode. For

proper operation, return the UPS to Auto mode using the following

procedure.

NOTE If the UPS remains in Manual Bypass mode and incoming AC power is lost, the load

is automatically dropped. The UPS must be in Auto mode to provide battery backup power.

NOTE If you have any questions or problems with the bypass operation, call the

Help

Desk

at one of the telephone numbers on page NO TAG and ask for a UPS technical

representative.

1. Press the menu button on the front panel display (see Figure 54 on

page 80). The System Status Menu displays.

2. Press the

button until the System Control menu displays.

3. Press the

button. Mode Preference displays.

4. Press the

button to access Mode Preference. The Enter

Password screen automatically opens.

5. Enter the appropriate password (0377 is the default), then press the

button.

6. Press the

button again and press the

button until you see Auto.

7. Press the

button and listen for a click.

8. Press ESC twice to return to the System Status Menu. The UPS is

now in Auto mode.

To disconnect AC input power during maintenance or service, turn the

bypass switch to the SERVICE position.

Table 4 shows the bypass switch models available for the Eaton 9170+

UPS.